Bi_(0.5)Ca_(0.25)La_(0.25)Fe_xMn_(1-x)O_3(x=0.3,0.4,0.5)的熔融盐合成及磁性表征  

Molten Salt Synthesis and Magnetic Characterization of Bi_(0.5)Ca_(0.25)La_(0.25)Fe_xMn_(1-x)O_3(x=0.3,0.4,0.5)

作　　者：董忠平[1,2] 肖淑艳 蔡颖 张胤 安胜利 

机构地区：[1]内蒙科技大学稀土学院,内蒙古包头014010 [2]吉林大学无机合成与制备化学国家重点实验室,吉林长春130012

出　　处：《稀土》2013年第2期87-90,共4页Chinese Rare Earths

基　　金：国家自然科学基金(90922034和20771042);内蒙古科技大学创新基金(2012NCL009)

摘　　要：以KCl为熔剂,通过环境友好的熔融盐法在相对较低的反应温度下合成了系列组成可调变的化合物Bi0.5Ca0.25La0.25FexMn1-xO3(x=0.3,0.4,0.5),同时借助于XRD、ICP元素分析和磁强计对样品进行表征。XRD表征结果显示所有样品都具有钙钛矿型正交结构,属于pbnm空间群;元素分析结果证实熔融盐合成得到的样品其组成符合最初反应物的投料比;磁性表征结果显示低铁含量样品(x=0.3)低温区存在典型Hopkinson效应,样品随Fe含量的增加,该效应减弱,同时样品的反铁磁性逐渐增强。Bi0.5Ca0.25La0.25FexMn1-xO3（x=0.3,0.4,0.5）have synthesized by the environment- friendly molten salt synthesis, KC1 as a flux. The samples are characterized with XRD, ICP element analysis and Magnetometer. XRD characteriza- tion revealed that all the samples adopt perovskite orthorhombie structure （space group Pbnm） ;Elemental analysis confirmed that sample composition is in accord with reactant ratio;Magnetic characterization results show that a typical Hopkinson effect exists below 50K for the sample of low Fe （ x = 0. 3 ）. With the increase of Fe content, the Hopkinson effect weaken quickly and antiferromagnetism is strengthened gradually.

关 键 词：熔融盐合成 钙钛矿 磁性 BI0 5Ca0 25La0 25FexMn1-xO3 

分 类 号：TQ152[化学工程—电化学工业]